US COVID-19 shutdown shows importance of background NO2 in inferring nitrogen oxide (NOx) emissions from satellite NO2 observations (N/A limited co-author role)

Data used in this study are: (1) 24 hour averaged surface NO2 data for March-August for 2019 & 2020; (2) a total of about 328 AQS sites that have no data gaps; (3) a trend analysis for a subset of those AQS sites that extends back to 2005; and (4) OMI (2005-2020) and TROPOMI (2018-2020) satellite-based data for NO2 tropospheric columns. Note that OMI and TROPOMI make swath measurements from low Earth sun-synchronous polar orbit (i.e., global coverage each day at approximately 1 PM local standard time). For data associated with this paper, please contact the corresponding author Zhen Qu at zhenqu@g.harvard.edu. This dataset is not publicly accessible because: Role in this research effort as limited advisor / manuscript co-author on non-EPA and publicly available AQS datasets. It can be accessed through the following means: For data associated with this paper, contact the primary author Zhen Qu at zhenqu@g.harvard.edu. Format: N/A. This dataset is associated with the following publication: Qu, Z., D. Jacob, R. Silvern, V. Shah, P.C. Campbell, L. Valin, and L. Murray. US COVID-19 Shutdown Demonstrates Importance of Background NO2 in Inferring NOx Emissions From Satellite NO2 Observations. GEOPHYSICAL RESEARCH LETTERS. American Geophysical Union, Washington, DC, USA, 48(10): e2021GL092783, (2021).

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[
  "https://doi.org/10.1029/2021gl092783"
]